CN217545892U - Power conversion device and motor unit - Google Patents
Power conversion device and motor unit Download PDFInfo
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- CN217545892U CN217545892U CN202220755282.6U CN202220755282U CN217545892U CN 217545892 U CN217545892 U CN 217545892U CN 202220755282 U CN202220755282 U CN 202220755282U CN 217545892 U CN217545892 U CN 217545892U
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- circuit
- substrate
- power conversion
- power module
- power
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Abstract
A power conversion device and a motor unit are provided, which can reduce the size of a circuit substrate in the thickness direction and simultaneously can help to restrain the influence of noise generated by switching action on elements on the circuit substrate. The utility model discloses a power conversion device has power module, condenser and circuit substrate, power module with the condenser just links together by electric connector side by side, circuit substrate covers power module with the condenser, wherein, circuit substrate includes control substrate portion and drive substrate portion, drive substrate portion is according to coming from the signal of control substrate portion is right power module's switching element drives, control substrate portion with drive substrate portion is located the coplanar, and forms as an organic whole, circuit substrate is equipped with the opening, at least some of electric connector is located the opening circuit substrate is last, in order to encircle open-ended mode is provided with shielding part.
Description
Technical Field
The utility model relates to a power conversion equipment and motor unit.
Background
Conventionally, there is a power conversion device including a control substrate, a capacitor, a drive substrate, and a power module, which are sequentially stacked and arranged in a thickness direction of the control substrate and the drive substrate via a bus bar.
In the above-described power conversion device, the control board, the capacitor, the drive board, and the power module are sequentially stacked in the thickness direction of the control board and the drive board, and therefore the size of the power conversion device in the thickness direction of the control board and the drive board is likely to increase.
In this case, the bus bar connecting the capacitor and the power module approaches the control board and/or the drive board, and it is difficult to secure an insulation distance, and noise generated by switching easily affects elements on the control board and the drive board.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and an object of the present invention is to provide a power conversion device and a motor unit that can reduce the size of a circuit board in the thickness direction and can also suppress the influence of noise generated by switching operations on elements on the circuit board.
In order to achieve the above object, the present invention provides a power conversion device having a power module, a capacitor and a circuit board, the power module and the capacitor are connected together side by side and by an electrical connector, the circuit board covers the power module and the capacitor, wherein the circuit board includes a control board portion and a driving board portion, the driving board portion is driven by a signal from the control board portion, the control board portion and the driving board portion are located in the same plane and are formed as a whole, the circuit board is provided with an opening, at least a part of the electrical connector is located in the opening on the circuit board in order to surround the shielding portion is provided in an open manner.
According to the utility model discloses a power conversion device, circuit substrate includes control substrate portion and drive substrate portion, and drive substrate portion drives the switching element of power module according to the signal that comes from control substrate portion, and control substrate portion and drive substrate portion are located the coplanar, and form as an organic whole, and circuit substrate is equipped with the opening, and at least a part of electric connector is located the opening, therefore, helps reducing the size of power conversion device in circuit substrate thickness direction; further, since the shield portion is provided on the circuit board so as to surround the opening, it contributes to suppressing the influence of noise generated by the switching operation on the elements on the circuit board.
In the power converter of the present invention, it is preferable that the control substrate portion and the drive substrate portion are arranged side by side, and the opening is provided between the control substrate portion and the drive substrate portion.
In the power converter according to the present invention, it is preferable that the plurality of electrical connection members are provided, at least two of the openings are provided in the circuit board so that a part of each of at least two of the electrical connection members is received, and the shield portion is a single metal ring-shaped body that surrounds all of the openings.
According to the power conversion device of the present invention, the plurality of electrical connection members are provided, and at least two openings are provided on the circuit substrate in such a manner that respective parts of the at least two electrical connection members are respectively received, thereby contributing to ensuring the strength of the circuit substrate, as compared with a case where only one opening is provided to receive respective parts of the plurality of electrical connection members; further, since the shield portion is a single metal annular body surrounding all the openings, the shield portion can be formed with a simple structure.
In the power converter according to the present invention, it is preferable that the circuit substrate is provided with a circuit component including at least one of an electronic element and a circuit pattern, and the circuit components having different polarities are spaced apart from each other by 2mm or more.
According to the power converter of the present invention, the circuit component is provided on the circuit board, the circuit component includes at least one of an electronic component and a circuit pattern, and the interval between the circuit components having different polarities is 2mm or more, which contributes to suppressing short-circuiting of the circuit components having different polarities due to foreign matter such as stains on the circuit board.
In the power converter of the present invention, it is preferable that the circuit board has a plurality of layers.
In the power converter according to the present invention, it is preferable that a diode is provided on the opposite side of the circuit board from the power module, and a slit is provided in the circuit board at a position corresponding to the diode.
According to the utility model discloses a power conversion device is equipped with the diode in circuit substrate's the opposite side with power module, is provided with the slit in circuit substrate's the position that corresponds with the diode, consequently, even if the diode is damaged because of the overvoltage, also ensures creepage distance easily.
In the power converter of the present invention, it is preferable that a gate resistor is provided on a side of the circuit board opposite to the power module.
According to the utility model discloses a power conversion device is equipped with grid resistance in circuit substrate's one side opposite with power module, consequently, when needs change grid resistance, carries out grid resistance's change operation easily.
In the power converter of the present invention, it is preferable that the circuit board is provided with a discharge circuit, and electronic components constituting the discharge circuit are separately provided on both surfaces of the circuit board.
According to the utility model discloses a power conversion device is provided with discharge circuit on circuit substrate, and the electronic component who constitutes discharge circuit separately sets up in circuit substrate's two sides, consequently, ensures heat radiating area easily, reduces the temperature of during operation.
In the power converter according to the present invention, it is preferable that a through hole into which a terminal of the power module is inserted and soldered is formed in the circuit board, and an electronic component is provided on the circuit board so as to avoid the through hole.
According to the utility model discloses a power conversion device, be formed with the through-hole that the terminal that supplies power module to insert in order to carry out the soldering on circuit substrate, be provided with electronic component on circuit substrate, electronic component avoids the through-hole, consequently, carries out the soldering operation of terminal and circuit substrate easily.
Further, in the power conversion apparatus of the present invention, it is preferable that the electric connector includes: a first bus bar extending from the power module to the opening; a second bus bar extending from the capacitor to the opening; and a screw located at the opening and connecting the first bus bar and the second bus bar to each other.
In the power converter of the present invention, it is preferable that a cooling portion for cooling the power module and the capacitor is provided on a side of the power module and the capacitor opposite to the circuit board.
Further, in order to achieve the above object, the present invention provides a motor unit, a motor thereof; and the above-described power conversion device that converts direct-current power supplied from the power supply into alternating-current power and supplies the alternating-current power to the motor.
(effects of utility model)
According to the present invention, the circuit board includes a control board portion and a driving board portion, the driving board portion drives the switching element of the power module according to a signal from the control board portion, the control board portion and the driving board portion are located in the same plane and are formed integrally, the circuit board is provided with an opening, and at least a part of the electrical connector is located in the opening, thereby contributing to reduction of the size of the power conversion apparatus in the thickness direction of the circuit board; further, since the shield portion is provided on the circuit board so as to surround the opening, it contributes to suppressing the influence of noise generated by the switching operation on the elements on the circuit board.
Drawings
Fig. 1 is a circuit diagram schematically showing a case where a power conversion device according to an embodiment of the present invention is used for driving a motor.
Fig. 2 is a perspective view schematically showing a power conversion device according to an embodiment of the present invention.
(symbol description)
10. Power conversion device
111. Power module
112. Capacitor with improved capacitance
113. Circuit board
1131. Control substrate part
1132. Drive substrate part
114. Electrical connector
1141. Bus bar
1142. Screw member
19. Shell body
191. Bottom wall
192. Side wall
20. Motor with a stator and a rotor
OP opening
SH shield part
R1 grid resistance
BT power supply
Detailed Description
Next, a power converter according to an embodiment of the present invention will be described with reference to fig. 1 and 2, where fig. 1 is a circuit diagram schematically showing a case where the power converter according to the embodiment of the present invention is used for a drive motor, and fig. 2 is a perspective view schematically showing the power converter according to the embodiment of the present invention.
For convenience of explanation, three directions orthogonal to each other are referred to as an X direction, a Y direction, and a Z direction, and one side in the X direction is referred to as X1, the other side in the X direction is referred to as X2, one side in the Y direction is referred to as Y1, the other side in the Y direction is referred to as Y2, one side in the Z direction is referred to as Z1, and the other side in the Z direction is referred to as Z2.
(Circuit configuration of Power conversion device)
As shown in fig. 1, the power converter 10 includes a power module 111, and the power module 111 includes a plurality of switching elements (for example, IGBT elements), converts dc power supplied from a power source BT into ac power, and supplies the ac power to a motor 20 serving as an electric target. As shown in fig. 1, the power conversion device 10 further includes a capacitor 112, and the capacitor 112 smoothes a voltage supplied from the power supply BT to the power module 111.
The motor 20 is, for example, a three-phase motor having three UVW phases.
(mechanical Structure of Power conversion device)
As shown in fig. 2, the power conversion apparatus 10 has a power module 111, a capacitor 112, and a circuit substrate 113, the power module 111 and the capacitor 112 being juxtaposed and connected together by an electrical connector 114, the circuit substrate 113 covering the power module 111 and the capacitor 112. The circuit board 113 includes a control board portion 1131 and a drive board portion 1132, the drive board portion 1132 drives the switching elements of the power module 111 in accordance with a signal from the control board portion 1131, and the control board portion 1131 and the drive board portion 1132 are integrally formed while being positioned in the same plane (i.e., extending in the same plane, in the example shown in the drawing, extending in the XY plane). The circuit substrate 113 is provided with an opening OP, and at least a part of the electrical connector 114 is located at the opening OP. The circuit board 113 is provided with a shield SH surrounding the opening OP.
Here, as shown in fig. 2, the power converter 10 includes a case 19, and the power module 111, the capacitor 112, and the circuit board 113 are housed in the case 19. Specifically, the case 19 has a bottom wall 191 and a side wall 192 rising from the peripheral edge of the bottom wall 191, and the power module 111, the capacitor 112, and the circuit board 113 are provided in a housing space formed by the bottom wall 191 and the side wall 192. The circuit board 113 and the bottom wall 191 face each other with a gap in the thickness direction of the circuit board 113 (in the illustrated example, the Z direction), and the power module 111 and the capacitor 112 are located between the bottom wall 191 and the circuit board 113 in the thickness direction of the circuit board 113. The power module 111 and the capacitor 112 are each rectangular parallelepiped (in the illustrated example, the longitudinal direction of the power module 111 and the capacitor 112 coincides with the Y direction), and the power module 111 and the capacitor 112 are arranged at intervals in a direction (in the illustrated example, the X direction) intersecting the thickness direction of the circuit board 113 (in the illustrated example, the power module 111 is located on the X1 direction side of the capacitor 112).
Further, as shown in fig. 2, in the circuit board 113, the control board portion 1131 and the drive board portion 1132 are integrally formed in a side-by-side manner (in the illustrated example, the arrangement direction of the control board portion 1131 and the drive board portion 1132 coincides with the arrangement direction of the power modules 111 and the capacitors 112, both in the X direction, and the drive board portion 1132 is located on the X1 direction side of the control board portion 1131), and the opening OP is located between the control board portion 1131 and the drive board portion 1132.
Further, as shown in fig. 2, the electrical connection member 114 is provided in plurality. At least two openings OP are provided in the circuit board 113 so that a part of each of the at least two electrical connectors 114 is received therein. The shield portion SH is a single metal ring-shaped body surrounding all the openings OP.
Further, the electrical connector 114 includes a bus bar 1141. Specifically, the bus bar 1141 includes: a first bus bar extending from the power module 111 to the opening OP; and a second bus bar extending from the capacitor 112 to the opening OP. Also, the electrical connector 114 further includes a screw 1142, the screw 1142 being located at the opening OP and connecting the first bus bar and the second bus bar to each other. The screw 1142 is a bolt, for example.
Further, a circuit constituent portion including at least one of an electronic element and a circuit pattern is provided on the circuit substrate 113. The interval between circuit components having different polarities is preferably 2mm or more. The circuit board 113 has, for example, a plurality of layers (that is, the circuit board 113 is a multilayer board).
Further, a diode (not shown, for example, a Desat diode, and a plurality of diodes are provided) is provided on the opposite side of the circuit board 113 from the power module 111 (in the illustrated example, the Z1 direction side), and a slit (not shown) is provided at a position of the circuit board 113 corresponding to the diode.
Further, a gate resistor R1 (one is illustrated in the illustrated example, but not limited to this in practice) is provided on the opposite side (the Z1 direction side in the illustrated example) of the circuit board 113 from the power module 111.
A discharge circuit (not shown) is provided on the circuit board 113 (for example, for discharging the capacitor 112), and electronic components constituting the discharge circuit are provided separately on both surfaces of the circuit board 113.
Through holes (not shown) into which terminals of the power module 111 are inserted and soldered are formed in the circuit board 113, and the electronic components on the circuit board 113 are provided so as to avoid the through holes.
(main effect of the present embodiment)
According to the power conversion device 10 of the present embodiment, the circuit substrate 113 includes the control substrate portion 1131 and the drive substrate portion 1132, the drive substrate portion 1132 drives the switching elements of the power module 111 in accordance with the signal from the control substrate portion 1131, the control substrate portion 1131 and the drive substrate portion 1132 are located in the same plane and are formed integrally, the circuit substrate 113 is provided with the opening OP in which at least a part of the electrical connection member 114 is located, and therefore, it is possible to contribute to reducing the size of the power conversion device 10 in the thickness direction of the circuit substrate 113; further, since the shield portion SH is provided on the circuit board 113 so as to surround the opening OP, it contributes to suppressing the influence of noise generated by the switching operation of the power module 111 on the elements on the circuit board 113.
The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.
For example, in the above embodiment, the power conversion device 10 is used to drive the motor 20, but the invention is not limited thereto, and the power conversion device 10 may be used to drive other devices.
In the above embodiment, the control board 1131 and the drive board 1132 are arranged side by side, but the present invention is not limited to this, and the control board 1131 and the drive board 1132 may be arranged in another manner such that one portion surrounds the other portion.
In the above embodiment, the number of the electrical connectors 114 and the openings OP may be changed as needed.
In addition, in the above embodiment, the shielding portion SH is one annular body surrounding all the openings OP, but is not limited to this, and the shielding portion SH may include a plurality of annular bodies surrounding each opening OP.
In the above embodiment, the circuit board 113 is a multilayer board, but the present invention is not limited to this, and the circuit board 113 may be a single-layer board.
In the above embodiment, the electronic components constituting the discharge circuit are separately provided on both surfaces of the circuit board 113, but the present invention is not limited thereto, and the electronic components constituting the discharge circuit may be provided on one surface of the circuit board 113.
In the above-described embodiment, a cooling unit for cooling the power module 111 and the capacitor 112 may be provided on the opposite side (the Z2 direction side in the illustrated example) of the power module 111 and the capacitor 112 from the circuit board 113.
In the above embodiment, the screw 1142 is a normal bolt, but the present invention is not limited to this, and the screw 1142 may be a thin-headed screw. This can further secure an insulation distance from the circuit board 113.
It should be understood that the present invention can freely combine the respective components in the embodiments or appropriately change or omit the respective components in the embodiments within the scope thereof.
Claims (11)
1. A power conversion device having a power module, a capacitor and a circuit substrate, the power module and the capacitor being side by side and connected together by an electrical connection, the circuit substrate covering the power module and the capacitor,
the circuit substrate comprises a control substrate part and a driving substrate part,
the driving substrate section drives the switching element of the power module in accordance with a signal from the control substrate section,
the control substrate portion and the drive substrate portion are located in the same plane and are formed integrally,
the circuit substrate is provided with an opening,
at least a portion of the electrical connector is located at the opening,
a shield portion is provided on the circuit board so as to surround the opening.
2. The power conversion apparatus according to claim 1,
the control substrate portion and the drive substrate portion are arranged side by side,
the opening is provided between the control substrate portion and the drive substrate portion.
3. The power conversion apparatus according to claim 1,
the electric connecting piece is provided with a plurality of electric connecting pieces,
at least two of the openings are provided in the circuit board so that a part of each of the at least two electrical connectors is received therein,
the shield portion is a single metal ring-shaped body that surrounds all of the openings.
4. The power conversion apparatus according to claim 1,
a circuit constituting part is provided on the circuit substrate,
the circuit constituent part includes at least one of an electronic element and a circuit pattern,
the circuit components having different polarities are spaced apart from each other by 2mm or more.
5. The power conversion apparatus according to claim 4,
the circuit substrate has a plurality of layers.
6. The power conversion apparatus according to claim 1,
a diode is provided on a side of the circuit substrate opposite to the power module,
a slit is provided in the circuit board at a position corresponding to the diode.
7. The power conversion apparatus according to claim 1,
and a grid resistor is arranged on the opposite side of the circuit substrate to the power module.
8. The power conversion apparatus according to claim 1,
a discharge circuit is provided on the circuit substrate,
the electronic components constituting the discharge circuit are separately provided on both surfaces of the circuit board.
9. The power conversion apparatus according to claim 1,
through holes into which terminals of the power module are inserted and soldered are formed in the circuit board,
and an electronic element is arranged on the circuit substrate and avoids the through hole.
10. The power conversion apparatus according to claim 1,
the electrical connector includes:
a first bus bar extending from the power module to the opening;
a second bus bar extending from the capacitor to the opening; and
a threaded member located at the opening and interconnecting the first bus bar and the second bus bar.
11. A motor unit, comprising:
a motor; and
the power conversion device according to any one of claims 1 to 10, which converts direct-current power supplied from a power source into alternating-current power and supplies the alternating-current power to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755282.6U CN217545892U (en) | 2022-03-31 | 2022-03-31 | Power conversion device and motor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755282.6U CN217545892U (en) | 2022-03-31 | 2022-03-31 | Power conversion device and motor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217545892U true CN217545892U (en) | 2022-10-04 |
Family
ID=83429631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220755282.6U Active CN217545892U (en) | 2022-03-31 | 2022-03-31 | Power conversion device and motor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217545892U (en) |
-
2022
- 2022-03-31 CN CN202220755282.6U patent/CN217545892U/en active Active
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